JP2008093502A - Regeneration method of charged filter medium - Google Patents
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- JP2008093502A JP2008093502A JP2006274777A JP2006274777A JP2008093502A JP 2008093502 A JP2008093502 A JP 2008093502A JP 2006274777 A JP2006274777 A JP 2006274777A JP 2006274777 A JP2006274777 A JP 2006274777A JP 2008093502 A JP2008093502 A JP 2008093502A
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Abstract
Description
本発明は、主にガス中の粉塵やミストを高い効率で捕集し、かつ使用後に洗浄し再帯電することで、再使用可能な帯電濾材の再生方法に関する。 The present invention relates to a method for regenerating a reusable charged filter medium by mainly collecting dust and mist in a gas with high efficiency, and washing and recharging after use.
従来、比較的長寿命の静電荷が付与された誘電材料を帯電濾材と称し、一般に気体浄化用フィルター等の分離材料、マスク等の衛生材料、マイクロフォン等の電子材料に利用されている。 Conventionally, a dielectric material provided with a relatively long life static charge is referred to as a charged filter medium, and is generally used as a separation material such as a gas purification filter, a sanitary material such as a mask, and an electronic material such as a microphone.
かかる帯電濾材は、気体浄化用等の分野でその静電気により通常の繊維材料では除去しにくいサブミクロンサイズやナノサイズの微細塵を高効率で除去する事ができるという特徴を有するため、多くの検討がなされている。但し、帯電濾材は、タバコ煙、オイルミスト等が負荷されることにより、帯電が消失する問題を有していた。そのため、帯電濾材は使い捨てとなっていた。 Such a charged filter medium has characteristics that it can efficiently remove fine dust of submicron size and nano size, which is difficult to remove by normal fiber materials due to its static electricity in the field of gas purification etc. Has been made. However, the charged filter medium has a problem that the charge disappears when it is loaded with tobacco smoke, oil mist and the like. Therefore, the charged filter medium is disposable.
このような問題に対して、それぞれ正、負に帯電する繊維状誘電体材料を層状に組み合わせる集塵フィルターが開示されている（例えば特許文献１参照）。しかしながら、繊維状誘電体材料を層状に組み合わせる場合は繊維同士の接触が十分に行えず、更に、通風などの摩擦帯電では、帯電効果が非常に小さいという問題を有していた。 For such a problem, a dust collection filter is disclosed in which fibrous dielectric materials that are positively and negatively charged are combined in layers (see, for example, Patent Document 1). However, when the fibrous dielectric materials are combined in layers, there is a problem that the fibers cannot sufficiently contact each other, and the friction effect such as ventilation has a problem that the charging effect is very small.
また、熱可塑性樹脂にイミダゾール化合物または脂肪族アマイド化合物を配合した樹脂組成物からなる洗浄可能フィルターが開示されている（例えば特許文献２参照）。しかしながら、洗浄後の性能が初期性能より大幅に低下する問題を有していた。 Further, a washable filter made of a resin composition in which an imidazole compound or an aliphatic amide compound is blended with a thermoplastic resin is disclosed (for example, see Patent Document 2). However, there has been a problem that the performance after washing is significantly lower than the initial performance.
本発明は、かかる従来技術の課題を背景になされたもので、優れた粉塵の捕集効率を発揮し、低圧力損失かつ再生使用可能な帯電濾材の再生方法を提供することにある。 The present invention has been made against the background of the problems of the prior art, and it is an object of the present invention to provide a method for regenerating a charged filter medium that exhibits excellent dust collection efficiency, has a low pressure loss, and can be regenerated.
本発明者らは鋭意検討した結果、遂に本発明を完成するに至った。即ち本発明は以下の通りである。 As a result of intensive studies, the inventors have finally completed the present invention. That is, the present invention is as follows.
１．少なくとも一種類の合成繊維からなる帯電濾材の再生方法であって、帯電濾材と成分が異なる帯電材と摩擦することを特徴とする帯電濾材の再生方法。
２．前記帯電材が針状、ブラシ状、シート状からなることを特徴とする上記１に記載の帯電濾材の再生方法。
３．前記合成繊維がポリアミド系繊維、ポリエステル系繊維、アクリル系繊維、ポリオレフィン系繊維であることを特徴とする上記１又は２に記載の帯電濾材の再生方法。
４．前記合成繊維に付着している繊維油剤量が０．１％未満であることを特徴とする上記１乃至３のいずれか記載の帯電濾材の再生方法。
1. A method for regenerating a charged filter medium comprising at least one kind of synthetic fiber, wherein the charged filter medium is rubbed with a charged medium having a component different from that of the charged filter medium.
2. 2. The method for regenerating a charged filter material according to 1 above, wherein the charging material comprises a needle shape, a brush shape, or a sheet shape.
3. 3. The method for regenerating a charged filter medium according to 1 or 2 above, wherein the synthetic fiber is a polyamide fiber, a polyester fiber, an acrylic fiber, or a polyolefin fiber.
4). 4. The method for regenerating a charged filter medium as described in any one of 1 to 3 above, wherein the amount of fiber oil adhering to the synthetic fiber is less than 0.1%.
本発明により、優れた粉塵の捕集効率を発揮し、低圧力損失かつ再生使用可能な摩擦帯電濾材を供給することができ、更に多様な素材に対応できるという有利な効果を有する。 According to the present invention, an excellent dust collection efficiency can be exhibited, a low-pressure loss and reusable frictionally charged filter medium can be supplied, and there are advantageous effects that it can cope with various materials.
以下、本発明を説明する。まず、帯電濾材に関して説明する。
本発明の帯電濾材は、合成繊維からなり、繊維は短繊維と長繊維のいずれでもよく、その集合形態として織物、編み物、不織布など種々のものを使用できるが、スパンボンド不織布、スパンレース不織布、フィルムスプリット不織布であることがより好ましい。更に、繊維の断面も円形、三角形、矩形、異形など種々の形状のものを使用できる。繊維径は、１００μｍ以下のものを使用でき、好ましくは０．１〜１００μｍ、特に０．５〜７０μｍのものが好ましい。製造容易で、かつ帯電濾材としての使用に適するからである。又、繊維からなる帯電濾材の目付量としては、１〜１０００ｇ／ｍ2 のものを使用でき、５〜５００ｇ／ｍ2 のものが好ましく、１０〜３００ｇ／ｍ2のものが一層好ましい。低圧損化が可能となり、コスト的に有利だからである。
The present invention will be described below. First, the charged filter medium will be described.
The charged filter medium of the present invention is composed of synthetic fibers, and the fibers may be either short fibers or long fibers, and various forms such as woven fabrics, knitted fabrics, and nonwoven fabrics can be used as the aggregate form thereof. A film split nonwoven fabric is more preferable. Furthermore, the cross section of a fiber can use various shapes, such as a circle, a triangle, a rectangle, and an irregular shape. A fiber diameter of 100 μm or less can be used, preferably 0.1 to 100 μm, particularly preferably 0.5 to 70 μm. This is because it is easy to manufacture and suitable for use as a charged filter medium. As the basis weight of the charged filter material comprising fiber, it can be used and 1 to 1000 g / m 2, preferably having 5 to 500 g / m 2, more preferably from 10 to 300 g / m 2. This is because low-pressure loss can be achieved, which is advantageous in terms of cost.
前記帯電濾材の帯電方法としては、コロナ荷電、電界荷電、熱間電界荷電、電子線照射、摩擦帯電などを挙げることができるが、これらに限定されるものではなく、高帯電量で電荷が安定的に保持されるのであれば他の荷電方法を用いてもよい。コロナ荷電、電界荷電で行う場合は、１０ｋＶ／ｃｍ以上で電界強度が好ましく、１５ｋＶ／ｃｍ以上の電界強度が一層好ましい。電子線照射の場合は、０．１〜１Ｍｒａｄ程度で照射することが好ましい。 Examples of the charging method of the charging filter medium include corona charging, electric field charging, hot electric field charging, electron beam irradiation, friction charging, and the like. However, the charging method is not limited thereto, and the charge is stable with a high charge amount. However, other charging methods may be used as long as they are retained. In the case of corona charging or electric field charging, the electric field strength is preferably 10 kV / cm or more, and more preferably 15 kV / cm or more. In the case of electron beam irradiation, it is preferable to irradiate at about 0.1 to 1 Mrad.
前記帯電濾材に短繊維を使用する場合、一般的に短繊維は加工性を良好にする為に潤滑剤や帯電防止剤など各種の油剤が塗布されているが、繊維上に油剤が付着したままでは繊維同士を摩擦させても十分に帯電することが困難となる。したがって摩擦帯電工程の前に繊維から油剤を除去しておくことが有効である。洗浄の方法としては、水、温水、アルコール等の溶剤を用いる方法、更にノニオン系の洗浄剤等を併用する手段がある。油剤除去の程度に関しては、ＪＩＳ Ｌ−１０１５化学ステープル試験方法に記載されているメタノール抽出方法で測定して０．１％未満が好ましい。０．１％以上であれば帯電に影響を及ぼす可能性がある。 When short fibers are used for the charge filter medium, the short fibers are generally coated with various oil agents such as lubricants and antistatic agents in order to improve processability, but the oil agents remain attached to the fibers. Then, even if the fibers are rubbed, it is difficult to sufficiently charge the fibers. Therefore, it is effective to remove the oil from the fiber before the tribocharging process. As a cleaning method, there are a method using a solvent such as water, warm water and alcohol, and a means using a nonionic cleaning agent in combination. The degree of oil removal is preferably less than 0.1% as measured by the methanol extraction method described in JIS L-1015 chemical staple test method. If it is 0.1% or more, the charging may be affected.
本発明の帯電濾材に用いる合成繊維は、ポリアミド系繊維、ポリエステル系繊維、アクリル系繊維、ポリオレフィン系繊維が用いられる。具体的には、ポリアミド系繊維は、ナイロン、アラミド等が挙げられる。ポリエステル系繊維は、ポリエチレンテレフタレート、ポリトリメチレンテレフタレート、芳香族ポリエステルが挙げられる。アクリル系繊維は、ポリアクリルニトリルが挙げられる。ポリオレフィン系繊維は、ポリエチレン、ポリプロピレン等が挙げられる。このような単一繊維やポリプロピレンとポリエチレン、ポリエチレンテレフタレートとポリエチレン等の複合繊維でも同様の効果が得られる。好ましくは、ナイロン、ポリエチレンテレフタレート、ポリアクリルニトリル、ポリエチレン、ポリプロピレン等である。 Synthetic fibers used in the charged filter medium of the present invention include polyamide fibers, polyester fibers, acrylic fibers, and polyolefin fibers. Specifically, examples of the polyamide fiber include nylon and aramid. Examples of the polyester fiber include polyethylene terephthalate, polytrimethylene terephthalate, and aromatic polyester. Examples of the acrylic fiber include polyacrylonitrile. Examples of the polyolefin fiber include polyethylene and polypropylene. The same effect can be obtained with such a single fiber or a composite fiber such as polypropylene and polyethylene or polyethylene terephthalate and polyethylene. Nylon, polyethylene terephthalate, polyacrylonitrile, polyethylene, polypropylene and the like are preferable.
前記合成繊維は、難燃剤、抗菌剤、抗黴剤等などが付与された繊維であってもかまわない。 The synthetic fiber may be a fiber provided with a flame retardant, an antibacterial agent, an antifungal agent, or the like.
次に、再生処理方法に関して説明する。
実際に帯電濾材を一般環境で使用した場合、微粒子、タバコ煙、オイルミスト、自動車排ガスを捕集して、帯電性能は低下する。使用済みの帯電濾材を洗浄、水洗、乾燥、摩擦帯電を行うことで再帯電が行え、再利用が可能となる。この摩擦帯電時に、帯電濾材と成分が異なる帯電材と摩擦させることにより、帯電性能が大幅に向上する。
なお、本発明では、再荷電後の粒子捕集効率の値が初期荷電後の粒子捕集効率の値に対し９０％以上、すなわち回復率が９０％以上である帯電濾材のことを再利用可能な帯電濾材とする。
Next, the reproduction processing method will be described.
When the charged filter medium is actually used in a general environment, the charging performance is deteriorated by collecting fine particles, tobacco smoke, oil mist, and automobile exhaust gas. The used charged filter medium can be recharged by washing, washing with water, drying and tribocharging, and can be reused. At the time of this frictional charging, the charging performance is greatly improved by rubbing against a charging material having a component different from that of the charging filter medium.
In the present invention, it is possible to reuse a charged filter medium whose particle collection efficiency value after recharging is 90% or more with respect to the particle collection efficiency value after initial charging, that is, the recovery rate is 90% or more. Use a charged filter medium.
再生方法に関して、まず、使用済みの帯電濾材の洗浄方法としては、水や温水やアルコール等の溶剤を用いる方法、更にノニオン系等の界面活性剤を用いる方法、超音波、高圧水による洗浄方法がある。帯電濾材の洗浄効果を高めるためには、界面活性剤の併用が好ましい。洗浄の目安は、使用前の帯電濾材の色に近づけることである。 Regarding the regeneration method, first, as a cleaning method for used charged filter media, there are a method using a solvent such as water, warm water and alcohol, a method using a nonionic surfactant, a cleaning method using ultrasonic waves and high-pressure water. is there. In order to enhance the cleaning effect of the charged filter medium, it is preferable to use a surfactant in combination. The standard of washing is to bring the color of the charged filter medium close to that before use.
洗浄後に行う水洗は、水、温水等で十分に洗浄する。界面活性剤除去の程度に関しては、ＪＩＳ Ｌ−１０１５化学ステープル試験方法に記載されているメタノール抽出方法で測定して０．１％未満が好ましい。０．１％以上であれば帯電に影響を及ぼす可能性がある。 Wash with water or warm water after washing. The degree of surfactant removal is preferably less than 0.1% as measured by the methanol extraction method described in JIS L-1015 chemical staple test method. If it is 0.1% or more, the charging may be affected.
乾燥は、帯電濾材を構成する繊維の中で、一番低融点の繊維の２０℃以下の乾燥温度で乾燥することが好ましい。融点付近で乾燥すれば、繊維が溶融し、繊維が固着化する可能性がある。 Drying is preferably performed at a drying temperature of 20 ° C. or lower of the fiber having the lowest melting point among the fibers constituting the charged filter medium. If it is dried around the melting point, the fiber may melt and the fiber may become fixed.
再帯電は、金属針、樹脂針等の針を使用して、ニードルパンチを使用して合成繊維と針とを摩擦する方法、馬毛、豚毛、合成繊維等からなるブラシで叩き加工を施す方法、シート状の不織布、フィルムを手袋等に加工したもので揉み加工する方法等がある。帯電濾材と帯電材が十分に摩擦できる方法であれば、再帯電することができる。 Recharging is performed by using a needle such as a metal needle or a resin needle, and using a needle punch to rub the synthetic fiber and the needle. There are a method, a sheet-like non-woven fabric, a method in which a film is processed into a glove, etc. Any method that can sufficiently rub the charged filter medium and the charged material can be recharged.
帯電濾材に基材を構成させることにより、再生処理時の形状を維持することが可能となる。基材としては、洗浄、水洗、乾燥、摩擦帯電に耐えうるシート状物であれば使用可能である。特に、織物、不織布、ネットが好適である。 By forming the base material in the charged filter medium, it is possible to maintain the shape during the regeneration process. As the substrate, any sheet-like material that can withstand washing, washing with water, drying and frictional charging can be used. In particular, woven fabric, non-woven fabric, and net are suitable.
以下本発明を実施例によってさらに詳細に説明するが、下記実施例は本発明を限定するものではなく、前・後記の趣旨に沿って設計変形することはいずれも本発明の技術的範囲に含まれるものである。 Hereinafter, the present invention will be described in more detail by way of examples. However, the following examples are not intended to limit the present invention, and any design modifications in accordance with the spirit described above and below are included in the technical scope of the present invention. It is what
（濾過特性の評価）
圧力損失（ＰＤ）は、帯電濾材試料をダクト内に設置し、濾材通過線速度が１０ｃｍ／秒になるようにコントロールし、濾材上流、下流の静圧差を圧力計で読み取り求めた。また粒子捕集効率Ｅ（％）の評価は、面に垂直方向に大気塵を含む空気を線速１０ｃｍ／秒で通過させ、上流側と下流側の空気をサンプリングし、パーティクルカウンターを用い０．３〜０．５μｍの粒径の粒子数をカウントした。粒子捕集効率（Ｅ）は下記の式を用いて算出した。
(Evaluation of filtration characteristics)
The pressure loss (PD) was obtained by placing a charged filter medium sample in a duct and controlling the filter medium linear velocity to be 10 cm / second, and reading the pressure difference between the upstream and downstream of the filter medium with a pressure gauge. The particle collection efficiency E (%) was evaluated by passing air containing atmospheric dust in a direction perpendicular to the surface at a linear velocity of 10 cm / second, sampling the upstream and downstream air, and using a particle counter. The number of particles having a particle size of 3 to 0.5 μm was counted. The particle collection efficiency (E) was calculated using the following formula.
（帯電濾材の油剤量、界面活性剤量）
摩擦帯電濾材の油剤量、界面活性剤量に関しては、ＪＩＳ Ｌ−１０１５化学ステープル試験方法に記載されているメタノール抽出方法で測定した。
(Amount of oil in charged filter media, amount of surfactant)
The amount of oil agent and the amount of surfactant in the frictionally charged filter medium were measured by the methanol extraction method described in the JIS L-1015 chemical staple test method.
（実施例１）
ポリエステル繊維（１．７ｄｔｅｘ×４４ｍｍ） ５０重量％と、ポリプロピレン繊維（２．２ｄｔｅｘ×５１ｍｍ）５０重量％を混繊してカードウェブを形成し、ウォーターパンチで５０ｇ／ｍ２の不織布を作製して乾燥した。得られた不織布の油剤量は０．１％未満であった。馬毛ブラシで叩き加工を行い、摩擦帯電させた。この帯電濾材を喫煙所に置き、一ヶ月間タバコ煙を負荷させた。その後、中性洗剤を用いて洗浄し十分に流水ですすいだ後、乾燥した。この濾材を馬毛ブラシで叩き加工を行い、再荷電した。
(Example 1)
A card web is formed by mixing 50% by weight of polyester fiber (1.7 dtex × 44 mm) and 50% by weight of polypropylene fiber (2.2 dtex × 51 mm), and a 50 g / m 2 non-woven fabric is produced by a water punch. Dried. The amount of oil agent in the obtained nonwoven fabric was less than 0.1%. Tapping with a horse hair brush and triboelectrically charged. This charged filter medium was placed in a smoking area and loaded with tobacco smoke for one month. Thereafter, it was washed with a neutral detergent, sufficiently rinsed with running water, and dried. The filter medium was beaten with a horse hair brush and recharged.
（実施例２）
ポリエステル繊維（１．７ｄｔｅｘ×４４ｍｍ） ５０重量％と、ポリプロピレン繊維（２．２ｄｔｅｘ×５１ｍｍ）５０重量％を混繊してカードウェブを形成し、ウォーターパンチで５０ｇ／ｍ２の不織布を作製して乾燥した。得られた不織布の油剤量は０．１％未満であった。馬毛ブラシで叩き加工を行い、摩擦帯電させた。この帯電濾材を喫煙所に置き、一ヶ月間タバコ煙を負荷させた。その後、中性洗剤を用いて洗浄し十分に流水ですすいだ後、乾燥した。この濾材をポリエチレン製手袋で揉み加工を行い、再荷電した。
(Example 2)
A card web is formed by mixing 50% by weight of polyester fiber (1.7 dtex × 44 mm) and 50% by weight of polypropylene fiber (2.2 dtex × 51 mm), and a 50 g / m 2 non-woven fabric is produced by a water punch. Dried. The amount of oil agent in the obtained nonwoven fabric was less than 0.1%. Tapping with a horse hair brush and triboelectrically charged. This charged filter medium was placed in a smoking area and loaded with tobacco smoke for one month. Thereafter, it was washed with a neutral detergent, sufficiently rinsed with running water, and dried. This filter medium was rubbed with polyethylene gloves and recharged.
（実施例３）
ポリプロピレン製スパンボンド不織布（２．２ｄｔｅｘ、５０ｇ／ｍ2）をコロナ荷電（１５ｋＶ、１０秒間）して帯電濾材を作製した。この帯電濾材を喫煙所に置き、一ヶ月間タバコ煙を負荷させた。その後、中性洗剤を用いて洗浄し十分に流水ですすいだ後、乾燥した。この濾材を馬毛ブラシで叩き加工を行い、再荷電した。
(Example 3)
A polypropylene spunbonded nonwoven fabric (2.2 dtex, 50 g / m 2 ) was corona charged (15 kV, 10 seconds) to produce a charged filter medium. This charged filter medium was placed in a smoking area and loaded with tobacco smoke for one month. Thereafter, it was washed with a neutral detergent, sufficiently rinsed with running water, and dried. The filter medium was beaten with a horse hair brush and recharged.
（実施例４）
ポリプロピレン製スパンボンド不織布（２．２ｄｔｅｘ、５０ｇ／ｍ2）をコロナ荷電（１５ｋＶ、１０秒間）して帯電濾材を作製した。この帯電濾材を喫煙所に置き、一ヶ月間タバコ煙を負荷させた。その後、中性洗剤を用いて洗浄し十分に流水ですすいだ後、乾燥した。この濾材をナイロン製ブラシで叩き加工を行い、再荷電した。
Example 4
A polypropylene spunbonded nonwoven fabric (2.2 dtex, 50 g / m 2 ) was corona charged (15 kV, 10 seconds) to produce a charged filter medium. This charged filter medium was placed in a smoking area and loaded with tobacco smoke for one month. Thereafter, it was washed with a neutral detergent, sufficiently rinsed with running water, and dried. The filter medium was beaten with a nylon brush and recharged.
（実施例５）
ポリプロピレン製スパンボンド不織布（２．２ｄｔｅｘ、５０ｇ／ｍ２）をコロナ荷電（１５ｋＶ、１０秒間）して帯電濾材を作製した。この帯電濾材を喫煙所に置き、一ヶ月間タバコ煙を負荷させた。その後、中性洗剤を用いて洗浄し十分に流水ですすいだ後、乾燥した。この濾材をポリエチレン製手袋で揉み加工を行い、再荷電した。
(Example 5)
A polypropylene spunbonded nonwoven fabric (2.2 dtex, 50 g / m 2 ) was corona charged (15 kV, 10 seconds) to produce a charged filter medium. This charged filter medium was placed in a smoking area and loaded with tobacco smoke for one month. Thereafter, it was washed with a neutral detergent, sufficiently rinsed with running water, and dried. This filter medium was rubbed with polyethylene gloves and recharged.
（実施例６）
ナイロン製スパンボンド不織布（２．２ｄｔｅｘ、５０ｇ／ｍ2）をコロナ荷電（１５ｋＶ、１０秒間）して帯電濾材を作製した。この帯電濾材を喫煙所に置き、一ヶ月間タバコ煙を負荷させた。その後、中性洗剤を用いて洗浄し十分に流水ですすいだ後、乾燥した。この濾材を馬毛ブラシで叩き加工を行い、再荷電した。
(Example 6)
A nylon spunbonded nonwoven fabric (2.2 dtex, 50 g / m 2 ) was corona charged (15 kV, 10 seconds) to produce a charged filter medium. This charged filter medium was placed in a smoking area and loaded with tobacco smoke for one month. Thereafter, it was washed with a neutral detergent, sufficiently rinsed with running water, and dried. The filter medium was beaten with a horse hair brush and recharged.
（比較例１）
ナイロン製スパンボンド不織布（２．２ｄｔｅｘ、５０ｇ／ｍ2）をコロナ荷電（１５ｋＶ、１０秒間）して帯電濾材を作製した。この帯電濾材を喫煙所に置き、一ヶ月間タバコ煙を負荷させた。その後、中性洗剤を用いて洗浄し十分に流水ですすいだ後、乾燥した。この濾材をナイロン製ブラシで叩き加工を行い、再荷電した。
(Comparative Example 1)
A nylon spunbonded nonwoven fabric (2.2 dtex, 50 g / m 2 ) was corona charged (15 kV, 10 seconds) to produce a charged filter medium. This charged filter medium was placed in a smoking area and loaded with tobacco smoke for one month. Thereafter, it was washed with a neutral detergent, sufficiently rinsed with running water, and dried. The filter medium was beaten with a nylon brush and recharged.
（比較例２）
ポリエステル製スパンボンド不織布（２．２ｄｔｅｘ、５０ｇ／ｍ2）をコロナ荷電（１５ｋＶ、１０秒間）して帯電濾材を作製した。この帯電濾材を喫煙所に置き、一ヶ月間タバコ煙を負荷させた。その後、中性洗剤を用いて洗浄し十分に流水ですすいだ後、乾燥した。この濾材をポリエステル製ブラシで叩き加工を行い、再荷電した。
(Comparative Example 2)
A charged filter medium was prepared by corona charging (15 kV, 10 seconds) of a polyester spunbonded nonwoven fabric (2.2 dtex, 50 g / m 2 ). This charged filter medium was placed in a smoking area and loaded with tobacco smoke for one month. Thereafter, it was washed with a neutral detergent, sufficiently rinsed with running water, and dried. The filter medium was beaten with a polyester brush and recharged.
上述した帯電濾材の使用前、タバコ煙負荷後、洗浄後、再帯電後の各状態において、先に説明した方法により０．３〜０．５μｍの粒子の捕集性能、圧力損失の測定を実施した。圧力損失は、初期荷電、タバコ煙負荷、再帯電でほとんど変化しなかった。粒子捕集効率と圧力損失の測定結果を表１に示す。 In each state after using the above-mentioned charged filter media, after loading with tobacco smoke, after washing, and after recharging, measurement of 0.3 to 0.5 μm particle collection performance and pressure loss is performed by the method described above. did. The pressure loss hardly changed with initial charge, cigarette smoke load, and recharge. Table 1 shows the measurement results of particle collection efficiency and pressure loss.
実施例１〜２は二種類の合成繊維から成る帯電濾材においては、手袋での揉み加工、またはブラシでの叩き加工で摩擦させることにより、粒子捕集効率が９５％以上回復し、再生できることを示している。 In Examples 1 and 2, in the charged filter medium composed of two types of synthetic fibers, the particle collection efficiency is recovered by 95% or more and can be regenerated by rubbing with a kneading process with a glove or a tapping process with a brush. Show.
実施例３〜６は一種類の合成繊維から成る帯電濾材においては、手袋での揉み加工、またはブラシでの叩き加工で摩擦させることにより、粒子捕集効率が９０％以上回復し、再生できることを示している。 In Examples 3 to 6, in the charged filter medium made of one type of synthetic fiber, the particle collection efficiency is recovered by 90% or more and can be regenerated by rubbing with a kneading process with a glove or a tapping process with a brush. Show.
比較例１、２は一種類の合成繊維から成る帯電濾材において、同一成分の帯電材と摩擦帯電させたことにより、性能回復率が３０％程度であり、同一成分では再帯電が起こりにくいことを示唆している。 In Comparative Examples 1 and 2, in the charged filter medium made of one type of synthetic fiber, the performance recovery rate is about 30% by triboelectric charging with the charging material of the same component, and recharging is less likely to occur with the same component. Suggests.
以上述べたように、本発明における帯電濾材及び空気清浄化用フィルターは特に空気清浄機や空調設備での使用条件において優れた性能を発揮することが可能であると同時に環境負荷も小さく、多様な素材に対応することが可能であり、本発明の産業上の利用性は大である。
As described above, the charged filter medium and the air cleaning filter according to the present invention can exhibit excellent performance especially under the use conditions in the air cleaner and the air conditioning equipment, and at the same time, the environmental load is small and various. It is possible to deal with materials, and the industrial applicability of the present invention is great.
Claims (4)
The method for regenerating a charged filter medium according to any one of claims 1 to 3, wherein the amount of fiber oil adhering to the synthetic fiber is less than 0.1%.
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| JP2006274777A JP2008093502A (en) | 2006-10-06 | 2006-10-06 | Regeneration method of charged filter medium |
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| JP2006274777A JP2008093502A (en) | 2006-10-06 | 2006-10-06 | Regeneration method of charged filter medium |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011005398A (en) * | 2009-06-24 | 2011-01-13 | Toyobo Co Ltd | Triboelectrified filter medium |
| JP2013121557A (en) * | 2011-12-09 | 2013-06-20 | Teijin Ltd | Nonwoven fabric for filter and filter |
| JP2013126885A (en) * | 2011-12-19 | 2013-06-27 | Fushitatsu Shoten:Kk | Soup stock extraction filter material and soup stock pack |
| JP2016049482A (en) * | 2014-08-29 | 2016-04-11 | 三菱電機株式会社 | Filter recharging device, and filter recharging method |
| JP2017172069A (en) * | 2016-03-23 | 2017-09-28 | 日本バイリーン株式会社 | Frictional electrification method |
| EP3741240B1 (en) * | 2020-03-31 | 2022-03-23 | Carl Freudenberg KG | Face mask with filter medium made from polypropylene filaments and use of a face mask |
-
2006
- 2006-10-06 JP JP2006274777A patent/JP2008093502A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011005398A (en) * | 2009-06-24 | 2011-01-13 | Toyobo Co Ltd | Triboelectrified filter medium |
| JP2013121557A (en) * | 2011-12-09 | 2013-06-20 | Teijin Ltd | Nonwoven fabric for filter and filter |
| JP2013126885A (en) * | 2011-12-19 | 2013-06-27 | Fushitatsu Shoten:Kk | Soup stock extraction filter material and soup stock pack |
| JP2016049482A (en) * | 2014-08-29 | 2016-04-11 | 三菱電機株式会社 | Filter recharging device, and filter recharging method |
| JP2017172069A (en) * | 2016-03-23 | 2017-09-28 | 日本バイリーン株式会社 | Frictional electrification method |
| EP3741240B1 (en) * | 2020-03-31 | 2022-03-23 | Carl Freudenberg KG | Face mask with filter medium made from polypropylene filaments and use of a face mask |
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